1. Electronic Materials Research Center; Korea Institute of Science and Technology; 5 Hwarang-ro 14-gil Seongbuk-gu Seoul 02792 Republic of Korea
2. Department of Nano-Materials Science and Engineering; Korea University of Science and Technology; Daejeon 305-350 Republic of Korea
3. Department of Materials Science and Engineering; Hoseo University; 20 Hoseo-ro, Baebang-eup Asan-Si Chungcheongnam-do 336-795 Republic of Korea